Sacrifice Israel to Win Iraq

"The deadly stalemate continues in Iraq. But this is a stalemate that can actively lead to a world war if Iraq is allowed to break up.

Instead of going into generalizations here is a scenario for how this could play out. The Shia are by far the biggest section of the population in Iraq, but the Sunnis are the best armed and organized. If the civil war is allowed to continue the Shia will want control of Baghdad."
Asterism

There is another scenario, one where the warring parties start to fight among themselves. Shi'a factions in Iraq fighting for control will spill over into Iran, Kurds breaking away from Iraq will draw the Kurds from Iran to their side, and millions of refugees pouring over the Iranian boarder will cripple the Iranian economy. Just to name a few